1/ If he works hard, he will pass the exam.
2/ If he worked hard, he would pass the exam.
3/ If we can avoid waiting, we will book the tickets in advance.
4/ if she hurried, she wouldn't miss the train.
5/ If they had enough money, they would buy the house.
6/ If we don't go, we will be late.
7/ If his father didnt die, he would be plan to go to the teacher training college.
8/ If they followed the map, they didnt get lost.
9/ If i didnt lost my passportlast week, i wouldnt a lot of troubles.